Method for improving the efficiency of the seal test of a booster fuel manifold

Abstract

The application discloses a method for improving the sealing test efficiency of a booster fuel manifold, and particularly relates to the following steps: spare parts, a ring pipe is a finished product, a spray rod is a semi-finished product, and only a fuel injection hole is left to be processed on the spray rod; after the spare parts are completed, the ring pipe as the finished product and the spray rod as the semi-finished product are assembled until a transition state booster fuel manifold assembly without the fuel injection hole on the spray rod is formed; the transition state booster fuel manifold assembly is connected to a sealing test system, and the sealing test of the transition state booster fuel manifold assembly is directly carried out to verify the sealing performance of the connection between the spray rod and the ring pipe; when the sealing test result is qualified, the transition state booster fuel manifold assembly is taken out of the sealing test system, and then the spray rod is disassembled from the ring pipe; the disassembled spray rod is sent to an electric spark puncher to complete the fuel injection hole processing, and the spray rod becomes a finished product; the spray rod as the finished product is reassembled with the ring pipe until a finished state booster fuel manifold assembly with the fuel injection hole on the spray rod is formed.

Description

Technical Field

[0001] This invention belongs to the field of aero-engine component manufacturing technology, and in particular relates to a method for improving the sealing efficiency of afterburner fuel manifold. Background Technology

[0002] Taking a certain type of aero engine as an example, such as Figure 1 As shown, the nozzle inlet of the afterburner fuel manifold has a small diameter and a short channel. When conducting a sealing test on the afterburner fuel manifold, a sealing fixture is required to seal all the injection holes on the nozzle. Due to the annular protrusion structure in the middle of the nozzle and the thick structure at the root of the nozzle, the structure of the sealing fixture is very complex. At the same time, the installation and disassembly of the sealing fixture are also very time-consuming and labor-intensive.

[0003] In addition, due to the constraints of the spray bar's shape and structure, the sealing reliability of the sealing fixture for all the oil spray holes on the spray bar will also decrease. It cannot be guaranteed that all the oil spray holes can be reliably sealed in one sealing clamping. Usually, multiple adjustments are required to meet the sealing test requirements.

[0004] In addition, the sealing fixture also has a certain weight. When the afterburner fuel manifold is tested for sealing, the nozzle and ring pipe need to be filled with a large amount of fuel. Under the combined force of the sealing fixture and the fuel, the afterburner fuel manifold is also at risk of deformation.

[0005] Furthermore, the narrow gap between adjacent spray bars places stringent requirements on the design of sealing fixtures, resulting in high design and manufacturing costs.

[0006] Therefore, due to the constraints imposed by the aforementioned factors during the sealing test of the afterburner fuel main, the efficiency of the sealing test is difficult to improve, and the various costs involved in the sealing test process are also very high. Summary of the Invention

[0007] To address the problems existing in the prior art, this invention provides a method for improving the efficiency of afterburner fuel manifold sealing tests. This method eliminates the need for sealing fixtures, saves on the design and manufacturing costs of sealing fixtures, mitigates the risk of deformation of the afterburner fuel manifold caused by the combined forces of the sealing fixtures and fuel, eliminates the installation and disassembly process of sealing fixtures, removes many constraints caused by the use of sealing fixtures, and significantly improves the efficiency of sealing tests.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a method for improving the sealing efficiency of the afterburner fuel manifold, specifically as follows:

[0009] S1: In the preparation stage before the assembly of the afterburner fuel main, spare parts are prepared; among them, the ring pipe is a finished part, the spray bar is a semi-finished part, and only the injection hole on the spray bar, which is a semi-finished part, has not been completed.

[0010] S2: After the spare parts are completed, the ring pipe, which is a finished part, is assembled with the spray bar, which is a semi-finished part, until they are combined into a transitional afterburner fuel manifold assembly without injection holes on the spray bar.

[0011] S3: Connect the transition afterburning fuel manifold assembly to the sealing test system and conduct a sealing test on the transition afterburning fuel manifold assembly to verify the sealing performance of the connection between the injector and the ring pipe;

[0012] S4: After the transition afterburning fuel manifold assembly completes the sealing test and the sealing test result of the connection between the injector and the ring pipe is qualified, remove the transition afterburning fuel manifold assembly from the sealing test system, and then disassemble and remove the injector from the ring pipe.

[0013] S5: The removed spray bar is sent into the EDM drilling machine to complete the processing of the oil spray holes through EDM drilling. At this time, the spray bar becomes a finished part with oil spray holes.

[0014] S6: Reassemble the finished spray bar with the ring pipe until it is assembled into a finished afterburner fuel manifold assembly with injection holes on the spray bar.

[0015] The beneficial effects of this invention are:

[0016] The method for improving the sealing efficiency of the afterburner fuel manifold in this invention eliminates the need for sealing fixtures, saves on the design and manufacturing costs of sealing fixtures, mitigates the risk of deformation of the afterburner fuel manifold caused by the combined forces of the sealing fixtures and fuel, eliminates the installation and disassembly process of the sealing fixtures, removes many constraints caused by the use of sealing fixtures, and significantly improves the sealing test efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the afterburner fuel manifold of a certain type of aircraft engine;

[0018] In the diagram, 1—ring pipe, 2—spray bar. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] A method for improving the efficiency of afterburner fuel manifold sealing tests, specifically:

[0021] S1: In the preparation stage before the assembly of the afterburner fuel main pipe, spare parts are prepared; among them, the ring pipe 1 is a finished part, the spray bar 2 is a semi-finished part, and the spray bar 2, as a semi-finished part, only has the injection hole left to be processed.

[0022] S2: After the spare parts are completed, the ring pipe 1, which is a finished part, is assembled with the spray bar 2, which is a semi-finished part, until they are combined into a transitional afterburner fuel manifold assembly without injection holes on the spray bar 2.

[0023] S3: Connect the transition state afterburning fuel manifold assembly to the sealing test system and conduct a sealing test on the transition state afterburning fuel manifold assembly to verify the sealing performance at the connection between the injector 2 and the ring pipe 1. It should be noted that during the sealing test, since the injector 2 of the semi-finished part has not been machined with fuel injection holes, the application of sealing fixtures is completely omitted in this step, and a series of problems associated with the application of sealing fixtures are also avoided and eliminated.

[0024] S4: When the transition afterburning fuel manifold assembly completes the sealing test and the sealing test result of the connection between the injector 2 and the ring pipe 1 is qualified, the transition afterburning fuel manifold assembly is removed from the sealing test system, and then the injector 2 is disassembled and removed from the ring pipe 1.

[0025] S5: Send the removed spray bar 2 into the EDM drilling machine to complete the processing of the oil spray hole by EDM drilling. At this time, the spray bar 2 becomes a finished part with oil spray hole.

[0026] S6: Reassemble the finished part, the spray bar 2, with the ring pipe 1 until it is assembled into a finished afterburner fuel manifold assembly with injection holes on the spray bar 2.

[0027] By adopting the above method, the use of sealing fixtures is completely eliminated in the sealing test, thus effectively saving the design and manufacturing costs of sealing fixtures. During the sealing test, the afterburner fuel manifold does not need to bear the force of the sealing fixtures, thereby alleviating the risk of deformation of the afterburner fuel manifold. Furthermore, since the installation and disassembly process of sealing fixtures is eliminated, the sealing test efficiency is greatly improved. According to actual calculations, the sealing test efficiency is improved by approximately 66% compared to existing methods.

[0028] Once the finished afterburner fuel manifold assembly is manufactured, flow tests can be conducted as usual. After the flow test results meet the design requirements, the assembly will undergo disassembly and marking, cleaning, and final inspection before being sealed, packaged, and stored.

[0029] The solutions described in the embodiments are not intended to limit the scope of patent protection of this invention. All equivalent implementations or modifications that do not depart from the scope of this invention are included in the patent scope of this case.

Claims

1. A method for improving the efficiency of afterburner fuel manifold sealing tests, characterized in that... Specifically: S1: In the preparation stage before the assembly of the afterburner fuel main, spare parts are prepared; among them, the ring pipe is a finished part, the spray bar is a semi-finished part, and only the injection hole on the spray bar, which is a semi-finished part, has not been completed. S2: After the spare parts are completed, the ring pipe, which is a finished part, is assembled with the spray bar, which is a semi-finished part, until they are combined into a transitional afterburner fuel manifold assembly without injection holes on the spray bar. S3: Connect the transition afterburning fuel manifold assembly to the sealing test system and conduct a sealing test on the transition afterburning fuel manifold assembly to verify the sealing performance of the connection between the injector and the ring pipe; S4: After the transition afterburning fuel manifold assembly completes the sealing test and the sealing test result of the connection between the injector and the ring pipe is qualified, remove the transition afterburning fuel manifold assembly from the sealing test system, and then disassemble and remove the injector from the ring pipe. S5: The removed spray bar is sent into the EDM drilling machine to complete the processing of the oil spray holes through EDM drilling. At this time, the spray bar becomes a finished part with oil spray holes. S6: Reassemble the finished spray bar with the ring pipe until it is assembled into a finished afterburner fuel manifold assembly with injection holes on the spray bar.

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